Idol Hooves holds a special place in Equestria. He's probably the only exiled changeling to serve in the Royal Guard, or at least, that's what he expects, as exiles don't really broadcast that fact. However, it's well known that Princess Celestia loves all of her little ponies, and her guards perhaps more so, and that makes it one of the best ways for a changeling to discreetly feed.

But how does a changeling even get there, let alone get exiled in the first place? For that matter, why would it ever go to Canterlot? Set a number of years before the series proper, before Luna’s redemption, Idol details how he was exiled, the ponies he’s met, and the series of misadventures that led him to joining the Royal Guard, and should continue a good ways into the series, as something of an alternate perspective.

Soon, he’ll have to deal with a boisterous new princess to serve and a royal wedding in the works bringing a third to power. Will his old instincts bring this new life crashing down around him? What precipitates Chrysalis’s ill-fated assault on Canterlot? Is it really so wrong for a changeling to enjoy good craftsmanship to an obsessive degree?

New cover art provided by the fantastic Carnifex

And a TVTropes page here.

And an Ask Blog of questionable canonity!
Out of Idol Curiosity

Fanart by Norad2! Major thanks! Short For a Royal Guard

Art by Egophiliac of Idol and his Daring Duckie Please don't tell him what that brush is meant for.

Rating updated to (T), it's a bit darker than (E)
Comedy Tag added as well
And changed the character tags a bit.

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

This story is a sequel to Twilight Sparkle of the Royal Guard

Between castle gossip, professional rivalries, a blooming romance, and a mysterious malefactor still at large, Decurion Twilight Sparkle has a lot on her plate. Hopefully, she'll make a few new friends as she moves towards the destiny she's chosen for herself.

As per usual, big thanks to Magello for the rad cover art!

There’s no end to the monsters that lurk in the dark.

Ghosts, werewolves, mad scientists, cultists, mutants, zombies, vampires, aliens and more lie in wait in the dark corners of Equestria, terrorizing the night. But the most infamous and dangerous of them all is the legendary witch Twilight Sparkle, with a five hundred million bit bounty on her head.

Seeking fame and fortune, Rainbow Dash sets out to defeat the legendary witch and collect the massive reward. The one thing she wasn't counting on was Twilight being less evil than she expected.

More stories set in this AU can be found here.

Cover art is a work in progress by Abode_WTF

This story is a sequel to Lovesickness

Following the lovesickness debacle, your relationship with Chrysalis has been strained. Your deal still stands, but... things are different now. And with some troubling rumors going around about your favorite bug, her motivation to leave the house has only gone down.

However, that doesn't mean you've given up on her. You still believe in her ability to do the right thing, and it is that belief that caused you to get into an altercation with some of your closest friends. But when that altercation escalates as a result of Chrysalis's actions, you find yourself taking on a serious injury that could very well be fatal.

It comes as a shock to everyone when Chrysalis scoops you up and makes a break for it. Although her motivations are unknown, it seems that she is dead set on keeping you away from the ponies that could help you.

But with no friends to assist her, where can Chrysalis even run to, and what could she possibly be planning?

This story is a sequel to Bed Bug

It was two months ago that you and Chrysalis struck a deal. Now, the two of you live together in your Ponyville home, under the condition that you share your love with the ex-queen while she... doesn't do villain stuff. You've grown quite close in that time, but despite getting her to slowly come out of her shell around you, she still refuses to leave the house.

So when you wake up one day to discover that she has contracted some sort of illness, it comes as a bit of a shock. She has apparently never been sick before, and you don't know enough about changelings to help her yourself. It seems like the only solution is to find somecreature who does.

However, the past is not so easily forgotten. How can you get help when the Changeling Kingdom wants nothing to do with her? When the wounds that she caused run so deep that even children bear their scars? When Chrysalis herself is so stubborn, so prideful, that she is unwilling to admit her fault in any of it?

When is a crime too terrible to forgive?

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)

This story is a sequel to Monsters

You might think that Equestrian nights are but serene exhibitions of Luna's work on the sky. You may believe that you can just lay out on the grass and admire the beautiful stars as a warm evening breeze caresses your mane. And you would be wrong.

Equestria is a magical place, and where there is magic, there is chaos. Dead rising from their graves, inanimate objects coming to life, strange apparitions making your foal cry in her room... sounds familiar? No? Then I'm doing my job right.

I'm Twilight Sparkle, and I work the Night Shift.

This follows canon up to the end of season 2.
Check out the Fanart Repository for lots of awesome Night Shift art!

Featured on Equestria Daily.
Winner of Stories Back from the Read 2013.
One hundred percent approved by Twilight's Library!
Special thanks to Nonagon and Wise Cracker.

Two decades after the banishment of Nightmare Moon, her shadow still lingers. Princess Celestia has been left to tend the Twin Thrones alone and protect us all from those who would see Equestria crumble. Our enemies take many forms: some would tear the world down with their claws, others with their smiles. They are monsters all the same.

I have had many names, and I have been many things. Today I am Swift Sweep, and I work for the Equestrian Bureau for State Security.

Special thanks:
NCMares (DeviantArt) for the gorgeous cover art.
Octavia Harmony: primary beta reader and editor throughout the many months of production.
PaulAsaran: for great help with and feedback on plot development and initial story drafting.
Kleora, Cerulean Voice, Nonagon: for further help with editing and story development.

Twilight is invited to Canterlot to compete with some of the greatest magicians in the world for the Moonstone Cup, a prestigious award for the most powerful and skillful magicians, unicorn and otherwise. Can she win? What sort of competition will she face?

Awesome cover image was taken from NoOneBahtim